The solid-solid phase transitions refer to the phase change between different crystalline forms of the same compound. Among them, the phase transitions driven by temperature are of note. Though these transitions often involve just minor structural modifications through displacive mechanisms, they can have a profound effect on a variety of the solid's physical properties. According to Landau theory [1]}, continuous phase transitions require that there is a group-subgroup relation between the involved crystal structures. Knowing the atomic details that occur during the phase relation plays a pivotal role in materials research. For instance, detecting possible symmetry-related structures is the basis for the identification of polar materials that are likely to have a ferroelectric to paraelectric phase transition at high temperatures [2]}, [3]}. In addition, there is a great potential to reduce the complexity of the search space in crystal structure prediction [4]}, [5]} by utilizing symmetry relations.
